Here's the situation:
This montero (1994) has been having problems maintaining idle for a while... sometimes it will idle, but most of the time it will cut off as soon as you take your foot off the gas pedal. It sat for about a month or two without being drivin and when I went to crank it, it was dead. When I went to jump it off, i was in a hurry and did a bone head thing... I reversed the jumper cables. When I realized what I did, I hooked them up right and cranked it up. The idle problem was the same, but as I revved the engine up, the sound from the radio cut out and it would come back on as the rpms dropped. If I revved the engine higher (@ 3k), the doors would lock!!. I noticed a small puff of smoke from behind the radio as well. I cut it off... Several fuses were blown and replaced. I did also notice that the fuseable link for the alternator was blown and haven't replaced it yet (no dealer), but did jump the terminal for a second to see if that made any difference. The speakers now hum and the door locks hum if I rev the engine. Obviously its from jumping it off the wrong way, but is it that the alternator is now bad and somehow sending excess voltage to the electrical system? Any ideas on how to check the system out? Thanks guys for any help, including help with the idle problem.